JMHRS-150/45 "Aolongxin" Precision Rockwell Hardness Tester (Head Mobile)

Product Introduction

“Aolong Xin”precisionRockwellSurface Rockwell, Double Rockwellhardness testerThe (head mobile) adopts advanced closed-loop sensor control technology to achieve fully automatic control and hardness testing process.

“Aolong Xin”The loading system adopts a high-precision force sensor and a central controller to form a closed-loop loop to achieve continuous tracking and control of the force application process throughout the entire process. The depth measurement system adopts high-precision displacement sensors, which can obtain the minimum hardness value with a resolution of0.1HR.

The stage is fixed and hardness testing is performed by moving the indenter up and down. The fixed test bench can eliminate the coaxiality error caused by the up and down rotation of traditional lead screws, greatly improving the accuracy and repeatability of testing, as well as increasing the stability and efficiency of machine operation.

Product Features:

1. High speed precision step control system, fixed test bench, achieving high-precision and fast testing

2. One click measurement with high accuracy

3. Can achieve remote control

4. Resolution of displacement sensor0.1μm

5. High repeatability accuracy

6. meet the standardASTM

7. E18,ASTM E384, ISO6508 GB/T230New design, mobile head structure,

8. The rack structure is sturdy

9. High precision linear guide rail controls the precise movement of the machine headhigh definitionLCD

10.Touch screen operation, menu based operation interface

11.Automatic loading and unloading test force, adjustable holding timeGO/NG

12.Tolerance judgment

Correction of test values for cylinders and spheres

13. Multiple selectable operating languages for convenient user operation14. Scale conversionHRTheHBThe

15.HV

16.built-in printer

The standard configuration is complete and can meet the testing requirements of all rulers

Product Enhancement:

The "Aolongxin" fully automatic high-speed response closed-loop sensor loading system, with the machine head automatically moving, achieves high-precision and rapid testing to improve the control accuracy of the actuator

The original system belongs to millisecond level control system and cannot achieve step control.

The "Aolongxin" system belongs to microsecond level control system and can achieve high-speed step control.

The step control accuracy can reach nanometer level!

Enhance the overall performance of the equipment, improve the detection accuracy and speed of the equipment

1. Improve the ability to process analog signals from power sensors. Change the 'eyes'

2. Improve the ability to process overall digital signals. Replace the 'core'

3. Improve the accuracy of displacement measurement. Change the 'ears'

4. Improve the accuracy of motor control. Change hands

5. Improve the human-machine interface. Change the 'face'Set up a dedicated management device for displacement sensors

QEI

The original motherboard does not have a dedicated management device, and the CPU must continuously handle the displacement sensor signals personally throughout the entire loading process.

After setting up a dedicated management device, the CPU only needs to read data at the start and end time points. During the loading process, the CPU can concentrate resources on managing force sensors and loading motors, making control faster and more accurate.

Importing high-precision magnetic grid displacement sensors from Japan

The in-situ displacement sensor is a domestically produced grating displacement sensor. There is a problem of poor consistency and it needs to be matched with other devices for selection.Japanese high-precision displacement sensors have high consistency and are less affected by environmental factors.

The lifespan can reach over 150 million cycles.Traditional electric chargingRockwell hardness tester

The force loading process is slow. If the loading speed is to be controlled within 8 seconds as required by the national standard GBT230/T-91, there will be a phenomenon of continuous overshoot and detachment of the red curve in the test force F to approach it, as shown in the figure. The result of this is that the hardness tester must slow down the testing speed, resulting in a long testing time; Secondly, the phenomenon of overshoot has to some extent affected the accuracy of the experiment.This device adopts more advanced and applicable technologyCentral processing chip

During the entire hardness test process, the central processing chip will process 18000 to 30000 sets of data at ultra-high speed from the start to the end of each hardness test. Shorten the loading action that traditional electric hardness testers require 8 seconds to 1.75 seconds (ISO6508-1:99 standardizes the test force application time within 1-8s). As shown by the blue curve in the figure, the speed of the loading process reaches the maximum speed, and the force value is smooth without overshoot during the process of loading to the total test force, which improves the loading speed and accuracy of the electric hardness tester.

Detailed explanation of the "Aolongxin" curve

1. Force value and depth curve.

During the operation of the hardness tester, the main chip reads real-time data from the pressure sensor and displacement sensor, and converts the data into curves. The curve in the figure shows the force value and depth curve of the 28.3HRC hardness block.

2. Pressure depth curve

Export synchronized data of pressure and pressure depth during the detection process, automatically generate pressure depth curves, and determine the shaded area for research on elastic modulus, etc.

The vertical axis in the figure represents pressure, and the horizontal axis represents depth

Accurate hardness correctionThe standard hardness curve is a straight line, as shown in the figureBlack line segment

.

The automatic hardness correction of traditional electric digital hardness testers is shown in the yellow line segment in the figure. The correction is generally divided into three sections, and only matches the standard hardness near the calibration point. The further away from the calibration point, the greater the difference in hardness values.

After further modification and improvement of the "Aolongxin" control method, the original hardness curve of the machine is shown as the red line segment in the figure. By applying a common coefficient to the hardness correction of the entire range, the hardness curve will be raised to a state that matches the standard hardness curve. The conclusion drawn from the experiment is that without any interval correction given a common coefficient, hardness tests were conducted on 24HRC, 48HRC, and 63HRC standard hardness blocks, with an error of 0.9HRC for 24HRC, 0.2HRC for 48HRC, and 0.8HRC for 63HRC, respectively.

The entire hardness range is now divided into 8 or more hardness correction intervals, as shown by the blue line segment in the figure. This correction method refines the entire hardness range and simplifies and refines the hardness correction of the electric digital hardness tester.

Overall dimensions